Nec Corporation

Soichiro Araki

Yoshihiko Suemura

Yoshiharu Maeno

Akio Tajima

Seigo Takahashi

Naoya Henmi

Mineto Satoh

Kenichiro Fujiyama

Tetsuri Ariyama

Tan Azuma

Ichiro Hatakeyama

Takeshi Nagahori

Kazunori Miyoshi

Tomoyoshi Sugawara

Tetsuo Imai

Atsushi Iwata

Masahiro Kubo

Katsumi Abe

Hiroaki Takahashi

Norihito Fujita

Yuji Ohno

Itaru Nishioka

Takeshi Akagawa

Ryo Yamada

Terumi Umematsu

Norito Fujita

An identification device including a generation unit and an information identification unit. The generation unit generates factor information relating to pulse-wave information with respect to an identification target in accordance with biological model information representing a relevance between pulse-wave information representing a pulse wave and the factor information representing a factor of pulse wave. The information identification unit selects certain list information satisfying a predetermined determination criterion of the factor information generated by the generation unit out of list information associating the factor information generated based on the pulse-wave information representing a pulse wave of a biological subject to be an identification target with identification information for identifying the biological subject, and identifies the identification information in the selected certain list information.

Identification device, identification method, and recording medium with recorded identification program

Provided are a prediction device and the like capable of more accurately simulating an analysis target. The prediction device generates function information for a gene sequence of a living body to be an analysis target based on first model information representing a relevance between sequence information and the function information, the sequence information representing the gene sequence of the analysis target, the function information representing a function potentially expressed by the gene sequence; and generates prediction information representing observation information predicted for the analysis target based on second model information and the function information, the second model information representing a relevance among the function information of the living body, environment information representing an environment around the living body, and the observation information observed for the living body, the function information being generated for the gene sequence of the analysis target.

Prediction device, gene estimation device, prediction method, and non-transitory recording medium

Provided is an information processing device, etc., that provides information which is the basis for quick detection of abnormalities that occur in a device. An information processing device calculates a degree of suitability between observation information and prediction information, the observation information observed for a system suffering an effect from an certain device, the prediction information predicted in accordance with a model for a state of the system; and calculates a difference between manipulation amount to the certain device and predictive manipulation amount predicted for the manipulation amount based on the model, the difference being a difference in case that the degree satisfies a predetermined calculation condition.

Information processing device, information processing method, and non-transitory recording medium

Provided are an abnormality determination device and the like that are able to accurately determine abnormalities regarding an inspection subject. The abnormality determination device is configured to calculate a scatter degree of differences between prediction information on an observation target and observation information on the observation target, the prediction information being an information generated in accordance with a scenario that represents an aspect of state change of the observation target, the observation information generated by an inspection target; and determine whether or not the inspection target is abnormal based on the calculated degree.

Abnormality determination device, abnormality determination method, and non-transitory recording medium

A simulation device includes a system model, a data selection processing unit, a plurality of observation models, a post-distribution creating unit, a post-distribution unifying unit, and a determining unit. The system model calculates a time evolution of a state vector. The data selection processing unit selects multiple items of observation data. The observation model converts the state vector from the system model on the basis of the relationship with the observation data. The post-distribution creating unit creates, on the basis of the state vector from the observation model and the selected observation data, a first post-distribution based on all pieces of the observation data or a second post-distribution based on absent observation data. The post-distribution unifying unit unifies the first and second post-distributions. The determining unit determines which of the second post-distribution or the unified post-distribution is to be used.

Simulation device, simulation method, and memory medium

To eliminate interruption of a service used by a user and reset of communication caused by switching of an operating server such as a process migration or the like. On receiving a session migration start request, server/network cooperation control meansissues an operating server-switching control start notification to an operating server switching control means(step S). On receiving the operating server switching control start notification, the operating server switching control meansswitches an operating server. Next, on receiving an operating server switching control completion notification, the server/network cooperation control meanssends a connection destination target network-switching request to a connection control means(step S). The connection control meansswitches the connection destination target network of the user corresponding to a user name whose connection destination target network is to be switched, from a target network including a main server to a switch destination target network including a backup server (step S).

Method of migrating processes between networks and network system thereof

Disclosed is a network system comprising: a plurality of routersandconnected to each other through a network; pseudo redundant configuration setting meansandwhich are connected respectively to the routers and which perform a communication using a redundancy protocol with respective routers; and association control meansconnected to the pseudo redundant configuration setting meansand, wherein when a serveris a backup server and its backup state needs to be maintained, the pseudo redundant configuration setting meansissues a signal for maintaining a standby state to the router, and when servers are switched between a standby state and operating state, the association control meanstransmits a switching instruction for switching between a standby state and operating state to the pseudo redundant configuration setting meansand

System using pseudo redundant configurator to switch network devices between operating and standby states

An optical cross-connecting device is small in scale of a switch even when a wavelength multiplexed signal to be transmitted through an optical fiber is high density and wide range. Switching of the wavelength multiplexed signals is performed in a first optical switch, switching per wavelength group in a second optical switch is performed for only signals required switching for smaller granularity, and switching per wavelength signals in a third optical switch is performed for only signals required switching for smaller granularity to from the opticall cross-connecting device. By this, even when the wavelength multiplexed signal to be transmitted through the optical fiber is high density and wide band, the optical cross-connecting device can be small in scale of a switch.

Optical cross-connecting device

An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.

Optical packet exchange system and optical switch

An optical receiving circuit is composed of a preamplifier circuit , an output differential amplifier and a mean value holding circuit . The optical receiving circuit is connected to a photodetector for receiving an input optical signal and outputting current. For the preamplifier circuit , a transimpedance type circuit may also be used. The preamplifier circuit comprises a feedback resistor and a resistor for detecting output voltage , the transimpedance gain is 55 dB &OHgr; and 3 dB bandwidth when the photodetector the capacity of which is 0.2 pF is connected to its output is 8 GHz. The output differential amplifier discriminates and regenerates data by regulating reference voltage Vref between the high level and the low level of the amplitude of an input signal. The mean value holding circuit includes a sample-hold circuit and capacity for holding the mean value of voltage output from the preamplifier circuit . As a CR time constant based upon the capacity and the resistor for detection is 1 ns., the mean value level of a received signal can be detected in approximately one byte of the data of 10 Gb/s. The sample-hold circuit samples the detected mean value level according to a sampling pulse from an external device and holds it. The output of the sample-hold circuit is used for the reference voltage of the differential amplifier

Optical receiving circuit and optical communication device

A packet switching network which allows the duration of guard time of each packet to be reduced to a minimum and the transmission efficiency of the network to be increased is disclosed. The sending nodes send the packet switch packets each having a guard time added thereto. The receiving nodes receive the packets from the packet switch. Each of the receiving nodes includes a switch timing detector for detecting switch timing of the packet switch based on a serial signal received from the packet switch, and a timing holder for holding the switch timing.

Packet switching network

Disclosed is an optical network which has: wavelength tunable optical transmitters of number MN, where N is an integer of two or more, each of which outputs an optical signal with arbitrary one of M wavelengths &lgr; , &lgr; , . . . , &lgr; , where M is an integer of two or more, that are different from one another; a MN&times;N optical switch whose input ports are connected to the respective wavelength tunable optical transmitters of number MN, and which allows optical signals input to different input ports to be output form its same output port; 1&times;M optical wavelength demultiplexers of number N which output demultiplexing optical signal with wavelengths &lgr; , &lgr; , . . . , &lgr; input from output ports of the MN&times;N optical switch into each wavelength; and optical receivers of number MN which receive optical signals input from the 1&times;M optical wavelength demultiplexers of number N.

Optical network

A bit synchronization circuit operates at high speed range as high as Gb/s or higher and can establish synchronization within 10 bits with rejecting jitter to permit accurate bit synchronization. The bit synchronization circuit thus generates a plurality of clocks having mutually different phases in synchronism with an input reference clock. A phase relationship between a plurality of clocks and an input data to be decided is discriminated by a phase comparator circuit. The clock having optimal phase relationship, namely clock having level transition timing having at a substantially center portion of mutually adjacent level transition timing of the input data, is determined by a phase determination circuit. An decision circuit and selector are provided for deciding input data at the level transition timing of the determined clock.

Growing community of inventors

Tokyo, Japan

Soichiro Araki